2 * \file FileFilterList.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Angus Leeming
8 * Full author contact details are available in file CREDITS.
13 #include "support/FileFilterList.h"
15 #include "support/lstrings.h"
16 #include "support/gettext.h"
18 #include <boost/regex.hpp>
19 #include <boost/tokenizer.hpp>
24 using std::ostringstream;
31 /** Given a string such as
32 * "<glob> <glob> ... *.{abc,def} <glob>",
33 * convert the csh-style brace expresions:
34 * "<glob> <glob> ... *.abc *.def <glob>".
35 * Requires no system support, so should work equally on Unix, Mac, Win32.
37 string const convert_brace_glob(string const & glob)
39 // Matches " *.{abc,def,ghi}", storing "*." as group 1 and
40 // "abc,def,ghi" as group 2.
41 static boost::regex const glob_re(" *([^ {]*)\\{([^ }]+)\\}");
42 // Matches "abc" and "abc,", storing "abc" as group 1.
43 static boost::regex const block_re("([^,}]+),?");
47 string::const_iterator it = glob.begin();
48 string::const_iterator const end = glob.end();
50 boost::match_results<string::const_iterator> what;
51 if (!boost::regex_search(it, end, what, glob_re)) {
52 // Ensure that no information is lost.
53 pattern += string(it, end);
57 // Everything from the start of the input to
58 // the start of the match.
59 pattern += string(what[-1].first, what[-1].second);
61 // Given " *.{abc,def}", head == "*." and tail == "abc,def".
62 string const head = string(what[1].first, what[1].second);
63 string const tail = string(what[2].first, what[2].second);
65 // Split the ','-separated chunks of tail so that
66 // $head{$chunk1,$chunk2} becomes "$head$chunk1 $head$chunk2".
67 string const fmt = " " + head + "$1";
68 pattern += boost::regex_merge(tail, block_re, fmt);
70 // Increment the iterator to the end of the match.
71 it += distance(it, what[0].second);
83 FileFilterList::Filter::Filter(docstring const & description,
84 std::string const & globs)
87 typedef boost::tokenizer<boost::char_separator<char> > Tokenizer;
88 boost::char_separator<char> const separator(" ");
90 // Given "<glob> <glob> ... *.{abc,def} <glob>", expand to
91 // "<glob> <glob> ... *.abc *.def <glob>"
92 string const expanded_globs = convert_brace_glob(globs);
94 // Split into individual globs.
95 vector<string> matches;
96 Tokenizer const tokens(expanded_globs, separator);
97 globs_ = vector<string>(tokens.begin(), tokens.end());
101 FileFilterList::FileFilterList(docstring const & qt_style_filter)
104 string const filter = to_utf8(qt_style_filter)
105 + (qt_style_filter.empty() ? string() : ";;")
106 + to_utf8(_("All files (*)"));
108 // Split data such as "TeX documents (*.tex);;LyX Documents (*.lyx)"
109 // into individual filters.
110 static boost::regex const separator_re(";;");
112 string::const_iterator it = filter.begin();
113 string::const_iterator const end = filter.end();
115 boost::match_results<string::const_iterator> what;
117 if (!boost::regex_search(it, end, what, separator_re)) {
118 parse_filter(string(it, end));
122 // Everything from the start of the input to
123 // the start of the match.
124 parse_filter(string(what[-1].first, what[-1].second));
126 // Increment the iterator to the end of the match.
127 it += distance(it, what[0].second);
132 void FileFilterList::parse_filter(string const & filter)
134 // Matches "TeX documents (*.tex)",
135 // storing "TeX documents " as group 1 and "*.tex" as group 2.
136 static boost::regex const filter_re("([^(]*)\\(([^)]+)\\) *$");
138 boost::match_results<string::const_iterator> what;
139 if (!boost::regex_search(filter, what, filter_re)) {
140 // Just a glob, no description.
141 filters_.push_back(Filter(docstring(), trim(filter)));
144 docstring const desc = from_utf8(string(what[1].first, what[1].second));
145 string const globs = string(what[2].first, what[2].second);
146 filters_.push_back(Filter(trim(desc), trim(globs)));
151 docstring const FileFilterList::as_string() const
156 vector<Filter>::const_iterator fit = filters_.begin();
157 vector<Filter>::const_iterator const fend = filters_.end();
158 for (; fit != fend; ++fit) {
159 Filter::glob_iterator const gbegin = fit->begin();
160 Filter::glob_iterator const gend = fit->end();
167 bool const has_description = !fit->description().empty();
169 ss << to_utf8(fit->description()) << " (";
171 for (Filter::glob_iterator git = gbegin; git != gend; ++git) {
181 return from_utf8(ss.str());
184 } // namespace support